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參數(shù)資料
| 型號： | TPS40070PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | GREEN, PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 27/28頁 |
| 文件大?。?/td> | 655K |
| 代理商： | TPS40070PWPR |
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C u
V
IN * 8 V
R
SR
(1)
R t
0.2 V
f
SW
Q
g(TOT) ) IDD
(2)
SETTING THE SWITCHING FREQUENCY (PROGRAMMING THE CLOCK OSCILLATOR)
R
T +
1
f
SW(kHz)
17.82
10*6
* 23
kW
(3)
100
1.5
0.5
1000
200
300
400 500
600
700
800 900
1.0
3.0
2.0
2.5
4.5
3.5
4.0
5.0
MINIMUM OUTPUT VOLTAGE
vs
FREQUENCY
fOSC - Oscillator Frequency - kHz
V
O
U
T
-
Output
V
oltage
-
V
VIN = 28 V
VIN = 24 V
VIN = 18 V
VIN = 15 V
VIN = 12 V
VIN = 10 V
VIN = 8 V
VIN = 5 V
fSW - Switching Frequency - kHz
SWITCHING FREQUENCY
vs
TIMING RESISTANCE
0
100
0
200
400
600
800
1000
200
300
400
500
600
R
T
-
T
iming
Resistance
-
k
PROGRAMMING THE RAMP GENERATOR CIRCUIT AND UVLO
SLUS582J – DECEMBER 2003 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com
where
V
VIN is the final value of the input voltage ramp
f
SW is the switching frequency
Q
g(TOT) is the combined total gate charge for both upper and lower MOSFETs (from MOSFET data sheet)
I
DD is the TPS4007x input current (3.5 mA maximum)
SR is the maximum allowed slew rate [12×104] (V/s)
The TPS4007x has independent clock oscillator and PWM ramp generator circuits. The clock oscillator serves as
the master clock to the ramp generator circuit. Connecting a single resistor from RT to ground sets the switching
frequency of the clock oscillator. The clock frequency is related to RT by:
Figure 2.
Figure 3.
The ramp generator circuit provides the actual ramp used by the PWM comparator. The ramp generator provides
voltage feed-forward control by varying the PWM ramp slope with line voltage, while maintaining a constant ramp
magnitude. Varying the PWM ramp directly with line voltage provides excellent response to line variations since
the PWM does not have to wait for loop delays before changing the duty cycle. (See Figure 9).
The PWM ramp must reach approximately 1 V in amplitude during a clock cycle, or the PWM is not allowed to
start. The PWM ramp time is programmed via a single resistor (RKFF) connected from KFF VDD. RKFF , VSTART
and RT are related by (approximately):
8
Copyright 2003–2009, Texas Instruments Incorporated
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| TPS40070PWPRG4 | 功能描述:DC/DC 開關(guān)控制器 Mid Range Input Freq Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40071 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-EFFICIANCY MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD |
| TPS40071EVM-001 | 功能描述:EVAL MODULE FOR TPS40071-001 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:Predictive Gate Drive™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| TPS40071PWP | 功能描述:DC/DC 開關(guān)控制器 Mid Rg In Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40071PWPG4 | 功能描述:DC/DC 開關(guān)控制器 Mid Rg In Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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